Subducted sediment plays a key role in modulating pore pressure and seismic behavior at subduction zones. We investigated the character of incoming sediments to test how basement variations relate along-strike changes within accretionary prism plate boundary conditions Nankai Trough. High-resolution data reveal for first time presence countourite mounded drifts Shikoku Basin. These features hav...

Submarine turbidity currents are a special type of sediment gravity flow responsible for turbidite deposits, attracting great interests from scientists and engineers in marine petroleum geology. This paper presents fully coupled computational fluid dynamics (CFD) discrete element method (DEM) model to quantitatively analyze the current propagation channels with two different topographic configu...

[1] Log and core data document gas saturations as high as 90% in a coarse-grained turbidite sequence beneath the gas hydrate stability zone (GHSZ) at south Hydrate Ridge, in the Cascadia accretionary complex. The geometry of this gassaturated bed is defined by a strong, negative-polarity reflection in 3D seismic data. Because of the gas buoyancy, gas pressure equals or exceeds the overburden st...

Hybrid geostatistical models aim at mimicking depositional events. The resulting models have the capability to simulate realistic stratigraphic structures for a variety of environments. However, this family of algorithms requires a high degree of parameterization. Therefore, having a good knowledge of the model parameters sensitivity is vital for understanding the behavior of such models. In th...

Hybrid geostatistical models imitate a sequence of depositional events in time. By considering sedimentation processes, these algorithms produce highly realistic subsurface structures from a variety of environments. However, since depositional events are forward-modeled, they cannot be directly conditioned to data. Therefore, conditioning requires solving a possibly expensive inverse problem. I...

Abstract The southwestern Ryukyu Trench represents the ultimate sink of sediments shed from Taiwan into Philippine Sea, which are mainly transported to trench by turbidity currents via submarine canyons. Here, we present turbidites intercalated with hemipelagites in a gravity pilot core and piston acquired on floor at 6147 m water depth. We performed X-ray fluorescence scans (ITRAX profiles), m...